Report on the work of its fourth session (29 March -20 April 1971) 

 - New York  United Nations          1971 
 - iv,63p  cm. 
<br/><br/> Supp. no. 17(A/8417) 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54(z).2.IN45.N71r, LI,17